Instanton Operators in Five-Dimensional Gauge Theories
arXiv:1412.2789 · doi:10.1007/JHEP03(2015)019
Abstract
We discuss instanton operators in five-dimensional gauge theories. These are defined as disorder operators which create a non-vanishing second Chern class on a four-sphere surrounding their insertion point. As such they may be thought of as higher-dimensional analogues of three-dimensional monopole (or `t Hooft) operators. We argue that they play an important role in the enhancement of the Lorentz symmetry for maximally supersymmetric Yang-Mills to SO(1,5) at strong coupling.
17 pages, Latex; v2: reference added; v3: typos corrected, references added and included a comment on Ï=0 instanton operators being BPS